<template>
	<div class="login_container">
		<div class="login_box">
			<!-- 头像 -->
			<div class="acatar_box">
				<img src="../assets/logo.png" />
			</div>
			<!-- 登录表单 -->
			<el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" class="login_form" label-width="0px">
				<!-- 用户名 -->
				<el-form-item prop="username">
					<el-input v-model="loginForm.username" prefix-icon="iconfont icon-user" />
				</el-form-item>
				<!-- 密码 -->
				<el-form-item prop="password">
					<el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password" />
				</el-form-item>
				<!-- 操作按钮 -->
				<el-form-item class="btns">
					<el-button type="primary" @click="login"> 登录 </el-button>
					<el-button type="info" @click="resetLoginForm"> 重置 </el-button>
				</el-form-item>
			</el-form>
		</div>
	</div>
</template>

<script>
export default {
	data() {
		return {
			loginForm: {
				username: 'admin',
				password: '123456',
			},
			// 这是表单的验证规则对象
			loginFormRules: {
				// 验证用户名是否合法
				username: [
					{
						required: true,
						message: '请输入登录名称',
						trigger: 'blur',
					},
					{
						min: 3,
						max: 10,
						message: '长度在 3 到 10 个字符',
						trigger: 'blur',
					},
				],
				// 验证密码是否合法
				password: [
					{
						required: true,
						message: '请输入登录密码',
						trigger: 'blur',
					},
					{
						min: 6,
						max: 15,
						message: '长度在 6 到 15 个字符',
						trigger: 'blur',
					},
				],
			},
		}
	},
	methods: {
		// TODO 重置操作，通过操作resetFields函数
		resetLoginForm() {
			this.$refs.loginFormRef.resetFields()
		},
		// TODO 登录及预校验（返回值为布尔值，true为通过验证）
		login() {
			this.$refs.loginFormRef.validate(async valid => {
				if (!valid) return
				const { data: res } = await this.$http.post('login', this.loginForm)
				if (res.meta.status !== 200) return this.$message.error('登录失败')
				this.$message.success('登录成功')
				// console.log(res.data.token);
				// TODO 把请求过来的token保存到sessionStorage里
				window.sessionStorage.setItem('token', res.data.token)
				// TODO 通过编程式导航跳转到后台其它页面，路由地址是 /home
				await this.$router.push('/home')
			})
		},
	},
}
</script>

// 样式
<style lang="less" scoped>
.login_container {
	position: relative;
	background-color: #2b4b6b;
	height: 100%;
}

.login_box {
	width: 450px;
	height: 300px;
	background-color: #fff;
	border-radius: 7px;
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);

	.acatar_box {
		position: absolute;
		left: 50%;
		transform: translate(-50%, -50%);
		height: 130px;
		width: 130px;
		border: 1px solid #eee;
		border-radius: 50%;
		padding: 10px;
		box-shadow: 0 0 10px #ddd;
		background-color: #fff;

		img {
			width: 100%;
			height: 100%;
			border-radius: 50%;
			background-color: #eee;
		}
	}
}

.login_form {
	position: absolute;
	bottom: 0;
	width: 100%;
	padding: 0 20px;
	box-sizing: border-box;
}

.btns {
	display: flex;
	justify-content: flex-end;
}
</style>
